Swinging margin bar



Oct. 20, 1931. w. K. MoLL SWINGING MARGINv BAR Filed oct. 9. 1929 Patented ct. 20,1931

- STATES PATENT OFFICE l WILHELM x. IiIoLLfol CHICACC, ILLINoIs, .AssIofNoIt` 'To-Duro, INCORPORATED, or

CHICAGO, ILLINoIs, A ConroRATIoN oF Wnsrn VIRGINIA swINGING MARGIN BAR VApplication filed October 9, 1929. Serial No. 398,327.

i y f` 4` .The invention relates to, duplicating machines of the hektograph type and has reference more particularlyto that class of such machines employing a flat. printing bed supi, ported on a suitable frame, a duplicating band or apron stretched vthereover between receiving and delivery spools, and an impression device Including av platen carriage which 1s adapted to be rolled'over the bed in order ,to impress boththe master. and copy sheets on thatportionv ofthe gelatineapron which is supported by the bed. f

f Helrtograph machines lindA extensive use in office. work, and especially in'billing opera- L tions IWhere itis desired to duplicate alarge number of bills to insure accurate and eiiicient 'checkingzmethods as, for example, in utility companies whichl issue a large number of monthl-ybills to their customers in. duplicate i. 2o form as well as retaining duplicates ofthe bills for theirown files.` To insure, in these billingoperations, accurate positioning and aligning of the mastensheets-with the forward edge, of the gelatine band so that the 2 5 duplicate copies, after impression upon the gelatine,rwill be providedwith adequate marginal edges, the, machines are equipped with marginV bars generally mounted within the frame of the machinel at'the forward end and parallel withthesurface of the gelatine band.

- One of the primary objects of the present invention is to provide hektograph machines with an improved means for accurately positioning the master sheets-andvco'pies upon the surfaceofy the gelatine bandsv and which will be adapted, upon actuation of the platencarriage tofbegin 'its vprinting strokes, to swing from a normal operating position Ato an inoperative position.

A more specific object of the presentinvention is to provide hektograph machines with a novel type ofmargin bar that will remain in inoperative position out of the way of the operator durin the printing voperation, thus providing or easy access Ato the forward edge ofthe master sheets andcopies during the printing'stroke of the platen carf riage.

` having operative and, inoperative positions with respect to the platen carriage, and novel means for actuating the bar in accordance with the travel of the platen carriage.

l A yet further object is to provide a margin bar which will be simple and durable in construction, economical in manufacture and reliable in operation.

With these and various lother objects in view, the inventionmay consist of certain novel features of construction and operation, as will be more fully described and particularly pointed out in the specification, drawings and claims appended hereto.

In the drawings, which illustra-te an embodiment of the device and wherein like reference characters are used to designate like parts- Figure 1 is a fragmentary sectional view of the forward end of a hektograph machine showing the margin bar in opera-tive position; f lFigure 2 is a sectional view similar to Figure 1 showing the margin bar in inoperative position; and

Figure 3 is a perspective view of the margin bar shown mounted within the frame of the machine.

4 The side members 10 constituting the frame of the machine have secured therein by any suitable securing means the flat platen or supporting bed 12 for accommodation of the gelatine band 14 which is stretched or mounted thereover. Adapted to travel back and forth over theV exposed surface of the gelatine band is a platen carriage designated in its entirety at 16. To facilitate the movement of the carriage, one of the side members 10 is generally provided with a suitable guide rail, and the carriage is equipped on one side with a guiding memberfor sliding engagement with the rail. This structure constitutes standard equipment on hektograph machines and is therefore not shown in detail, inasmuch as 'it forms no part of the present invention. Journaled within the end frames 18 of the platen carriage in proximity to the gelatine surface is a plurality of impression and stripping` rollers 2() and 22 which are adapted, upon actuation of thel carriage handle 24, to be spaced sutlicientl'y to allow insertion of the forms or copies designated at 26 between them, and, upon further actuation of the handle, to assume their closed or operative position. This actuation of the carriage handle not only operates to provide for spacing of the rollers as described, but

Valso operates upon the roller 20 to raise the roller from the surface of the gelatine band 14 so that the forms or copies 26 will slide beneath the roller upon insertion and abut the stops on the margin bar l30 to be hereinafter more fully described.

yReferring to Figure 3, the bar is shownV balanced by the base plate 32 and the addiy tional weights comprising the margin stops 34, that normally the bar will hang so that the plate 32Y is on an inclinel sloping from left to right whichl maintains that edge of the plate 32 adjacent the margin stops slightly below the surface of the gelatine bandas' shown in Figure 2. This constitutes'the inoperative position of the bar.

To cause the margin bar to assume its operative-position, a dog 46 is provided having pivotal engagement with the supporting vblocks at 48 and equipped with a Vcam .50 for camming engagement with the forward and sloping. surface 52 of the end members 34. In the operation of the machine, as the carriage reaches the forward'end or the vend vof its travel ina direction toward the operator, the cross rail 54 will engage the'sloping end ofthe 'dog 46 causing it to dip and giving a consequent clockwise movement to the cam 50. This movement of the cam towards the end members results in the plate 32,' and consequently the edge adjacent the stops 44, being elevated until the carriage reaches its eXtreme forward position, when the edge will be on aline .with theupper surface of the gelatine band 14 as disclosed in Figure'l.

. In this'position the rollers 2O and Y22 are adapted to be spaced by actuation of the handle` 24 and the duplicate copy removed. Another blank copy is then inserted between the spaced rollers and under the roller 20 until its forward edge abuts the stops 44 on -the margin bar 30 which properly positions the copy with respect to the edge ofthe gelatine band, when the rollers can then be closed and the printing stroke of the carriage begun. This operation requires the carriage to travel rearward or away from the operator, thus impressing the blank copy upon the surface of the gelatine band and, at the same time, releasing the dog 46 from under the cross rail 54 which,--of course, allows the margin bar'to swing into its inoperative position.

copy during the printing stroke of the carriage when it may be necessary to strip the duplicate copy from the gelatin band, as is often the casein duplicating Abills and other masterY sheets lof the same or smaller size.`

Y It is to be `understood that I do not wish to be limited by the exact embodiment of the device shown, which is merely by way of illustration and not limitation, as various and other forms of the device will ofl course be apparent to those skilled in Vthe art without departing from the.. spirit of the invention or the scope of the claims. Y Y v I claim: v l. In a duplicating machine the combination with a printing bed, a platen carriage adapted to travel over said bed, a margin bar pivoted to said machine atlone end of v said bed, and adapted toswing from an operative positionto aninoperative position with lrespect to said carriage, actuating means Y for said bar including a pivoted dog having engagement with said bar, and means on said carriage adapted to depress or release said dog.

2. In a duplicating machine lthe combiiia- 'iba erative position and to expose the edge of said sheet when in inoperative position, actuating means for said barl including a pivoted dog, yand means on said carriage adapted to depress or release said dog.

Y 3i In ayduplicatingfrmachine the combination with ay printing bed, a platen carriage adapted" to travel 'oversaid bed, means for positioning a sheet ofpaperupon said bed after insertion in'saidlcarriageincluding a margin bar pivoted to said machine, and a pivoted dog for actuating saidfbar' to cause it to assume an inoperative position during the printing stroke of said platen carriage.

4. In a duplicating machine the combina. tion with a printing bed, `aplaten carriage adapted to travel 'over said bed, means for positioning a sheet of paper upon said bed after insertion in said carriage Vincluding a margin bar pivoted tol said machine, `and a pivoted dog foractuating said bar to .cause it4 to assume an inoperative position during the printing stroke of said platen carriage and an operative position at the completion of said stroke.

5. In a duplicatin machine the combination with a printing ed, of a laten carriage adapted to travel over said ed, a margin bar at one end of said bed and .adapted to swing from an operative to an inoperative position With respect to said carriage, and actuating means for said bar including a dog adapted to be enga ed by said carriage.

6. In a device o the class described, in combination with a printing bed and a laten carriage adapted to travel over said d, a pivoted margin bar having operative and inoperative positions With respect to said printing bed, and means for actuating said bar including a pivoted dog having engagement with said bar and means on said carriage adapted to depress and release said dog.

7. In a device of the character described, in combination a margin bar having a horizontal operative position and a sloping inoperative position, comprising a base plate provided with paper stop devices, end members integral with said base plate, and means for pivotally securing said end members to allow said bar to assume ay sloping inoperative position.

8.. In a device of the character described, in combination a margin bar having a horizontal operative position and a sloping inoperative position, said bar comprising a base plate with upstanding end members secured to said base plate, supporting blocks to which said end members are pivotally secured, and a dog pivoted to said blocks and adapted to have camming engagement with said end members, Whereb actuation of said dog 1ocates said bar eit er in operative or inoperative position.

Signed at Chicago, Illinois, this 5th day of October, 1929.

WILHELM K. MOLL, 

